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A034169 Disjoint discriminants (one form per genus) of type 2. 3
1, 3, 5, 11, 15, 21, 29, 35, 39, 51, 65, 95, 105, 165, 231 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

J. M. Borwein, D. H. Bailey and R. Girgensohn, Experimentation in Mathematics, A K Peters, Ltd., Natick, MA, 2004. x+357 pp. See p. 198.

J. M. Borwein and P. B. Borwein, Pi and the AGM, page 293.

L. E. Dickson, Introduction to the theory of numbers, Dover, NY, 1929.

LINKS

Table of n, a(n) for n=1..15.

J. Borwein and K.-K. S. Choi, On the representations of xy+yz+zx, Experimental Mathematics, 9 (2000), 153-158.

Experimental Mathematics, Home Page

FORMULA

a(n) = A034168(n) / 2. - Sean A. Irvine, Aug 03 2020

CROSSREFS

Cf. A034168, A034170.

Sequence in context: A281575 A105772 A244520 * A217384 A335279 A136977

Adjacent sequences:  A034166 A034167 A034168 * A034170 A034171 A034172

KEYWORD

nonn,fini,full,nice

AUTHOR

Jonathan Borwein (jborwein(AT)cecm.sfu.ca), choi(AT)cecm.sfu.ca (Stephen Choi)

STATUS

approved

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Last modified October 6 16:13 EDT 2022. Contains 357269 sequences. (Running on oeis4.)